Several queues in Exchange 2010 error 451 4.4.0

I have several domains that keep trying to retry with no luck as the mail messages keep piling up in the queue. The all have the same error message 451 4.4.0 Primary target IP address responded with: "421 4.4.2 connection dropped due to socket error. Attempted failover to alternate host, but did not succeed.

Please some help would be appreciated.
natevelli2Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Alan HardistyCo-OwnerCommented:
Please have a read of my article and check you don't have any obvious configuration / blacklisting problems:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/A_2427-Problems-sending-mail-to-one-or-more-external-domains.html

If you do - what are they?
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
natevelli2Author Commented:
Good on blacklist, DNS reverse lookup for mail server is setup, have a sonic firewall ns 240 and dont see anything out of the ordinary there.
0
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

Alan HardistyCo-OwnerCommented:
Have you got SMTP Inspection enabled on your Sonicwall?
0
natevelli2Author Commented:
I do not see anything for smtp inspection on my firewall. Where should I look?
0
Alan HardistyCo-OwnerCommented:
Try the following (I don't know the SonicWall range, but know about the problems when using them):

Security Services > Gateway Anti-Virus page.  Is SMTP inbound or Outbound enabled?

(Extracted from Page 46 -  http://www.sonicwall.com/downloads/SonicWALL_NSA_240_Getting_Started_Guide.pdf)
0
natevelli2Author Commented:
I disabled smtp in and outbound with no luck.
0
natevelli2Author Commented:
After a bunch of back and forths it finally ended up being the recieving side using SORBS and our ISP using dynamic IPs
0
Alan HardistyCo-OwnerCommented:
Just curious as to why the solution seems to be that you were blacklisted yet my comment http:#a37840409 which suggests you check there are no obvious blacklisting issues wasn't included as part of the solution.

Alan
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Outlook

From novice to tech pro — start learning today.